Used in analytical chemistry for titration processes, particularly in iodometric titrations to determine the concentration of oxidizing agents such as hydrogen peroxide, chlorine, and potassium permanganate. Serves as a source of iodide ions to generate iodine in situ when reacting with oxidizers, enabling precise quantitative analysis. Commonly employed in quality control laboratories, environmental testing, and pharmaceutical analysis for standardization of sodium thiosulfate solutions. Also utilized in calibration of instruments and validation of analytical methods requiring a reliable and consistent iodide source.